Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2018-03-01 — TX
Operator
Tennessee Gas Pipeline Company
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$608
Incident datetime
2018-03-01 20:03
Report number
Location
TX
Narrative
On 3/1/18 at approximately 7:31 pm a compressor on unit 2 in the compressor building had an issue whereby the compressor rod packing began leaking causing the gas detector to sense 40% lel which initiated a station hazard atmosphere alarm and caused emergency shut down (esd). At 8:00pm an erl call was sent out. At 8:03 local operating personnel identified that the station esd valve was still venting gas beyond the typical station blow down time. Upon further investigation personnel found that station discharge valve (a2-d1) did not fully closed as required with an esd event. Personnel identified that the supply gas tubing to the station discharge valve's actuator came dislodged during the initiation of the esd process which prevent the full closure of this valve. Personnel isolated the supply gas and then reconnected it to the actuator. Once reconnected the gas supply was opened again and the station discharge valve closed as required. This stopped the venting of natural gas from the station's esd valve.
Detailed record list
Report Received Date
2018-03-29 00:00:00
Iyear
2018
Report Number
20180035
Supplemental Number
30176
Report Type
Supplemental Final
Operator Id
19160
Name
Tennessee Gas Pipeline Company
Operator Street Address
1001 Louisiana St
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Local Datetime
2018-03-01 19:31:00
Location Latitude
27.7484
Location Longitude
-97.8569
Nrc Rpt Num
1205581
Nrc Rpt Datetime
2018-03-01 20:28:00
Commodity Released Type
Natural Gas
Unintentional Release
24118
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
No
Shutdown Explain
The Esd Happened Before The Incident.
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2018-03-01 20:03:00
On Site Datetime
2018-03-01 20:03:00
On Off Shore
Onshore
Onshore State Abbreviation
Tx
Onshore Postal Code
78330
Onshore City Name
Agua Dulce
Onshore County Name
Nueces
Designated Location
Milepost
Designated Name
Valve A2-D1
Pipe Fac Name
Compressore Station # 1
Segment Name
Gas Suppy Tubing To Valve A2-D1
Federal
No
Location Type
Operator-Controlled Property
Incident Area Type
Aboveground
Incident Area Subtype
Typical Aboveground Facility Piping Or Appurtenance
Crossing
No
Pipe Facility Type
Interstate
System Part Involved
Onshore Compressor Station Equipment And Piping
Item Involved
Tubing
Installation Year
1999
Material Involved
Material Other Than Carbon Steel Or Plastic
Material Details
Stainless Steel
Release Type
Other
Release Type Details
The Supply Gas Tubing To The Station Discharge Valve's Actuator Came Dislodged During An Esd Event Which Kept The Valve From Going Fully Closed.
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
481
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
65118
Est Cost Intentional Release
0
Est Cost Prop Damage
608
Est Cost Emergency
0
Est Cost Other
0
Prpty
65726
Accident Psig
845
Mop Psig
860
Mop Cfr Section
192.619(A)(1)
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Pipeline Function
Transmission System
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
Yes
Accident Identifier
Other
Accident Details
Local Operating Personnel Including Contractors.
Investigation Status
No, the operator did not find that an investigation of the controller(s) actions or control room issues was necessary due to: (provide an explanation for why the operator did not investigate)
Investigation Status Details
This was a manned facility and the gas control or scada was not responsible for the events that occurred at the compressor station.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Defective Or Loose Tubing Or Fitting
Eq Failure Type
Defective Or Loose Tubing Or Fitting
Additional Vibration Ind
Yes
Preparer Name
K**** B******
Preparer Title
Pipeline Engineer - Compliance-Codes And Standards
Preparer Email
K************@k***********.com
Preparer Telephone
3616886492
Authorizer Name
J**** H********
Authorizer Title
Director - Compliance - Codes And Standards
Authorizer Telephone
7133699443
Authorizer Email
J**************@k***********.com
Narrative
On 3/1/18 at approximately 7:31 pm a compressor on unit 2 in the compressor building had an issue whereby the compressor rod packing began leaking causing the gas detector to sense 40% lel which initiated a station hazard atmosphere alarm and caused emergency shut down (esd). At 8:00pm an erl call was sent out. At 8:03 local operating personnel identified that the station esd valve was still venting gas beyond the typical station blow down time. Upon further investigation personnel found that station discharge valve (a2-d1) did not fully closed as required with an esd event. Personnel identified that the supply gas tubing to the station discharge valve's actuator came dislodged during the initiation of the esd process which prevent the full closure of this valve. Personnel isolated the supply gas and then reconnected it to the actuator. Once reconnected the gas supply was opened again and the station discharge valve closed as required. This stopped the venting of natural gas from the station's esd valve.
| Report Received Date | 2018-03-29 00:00:00 |
|---|---|
| Iyear | 2018 |
| Report Number | 20180035 |
| Supplemental Number | 30176 |
| Report Type | Supplemental Final |
| Operator Id | 19160 PHMSA Enforcement |
| Name | Tennessee Gas Pipeline Company |
| Operator Street Address | 1001 Louisiana St |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Local Datetime | 2018-03-01 19:31:00 |
| Location Latitude | 27.7484 Google Maps OpenStreetMap |
| Location Longitude | -97.8569 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1205581 NRC Report How to search |
| Nrc Rpt Datetime | 2018-03-01 20:28:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 24118 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | The Esd Happened Before The Incident. |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2018-03-01 20:03:00 |
| On Site Datetime | 2018-03-01 20:03:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 78330 |
| Onshore City Name | Agua Dulce |
| Onshore County Name | Nueces |
| Designated Location | Milepost |
| Designated Name | Valve A2-D1 |
| Pipe Fac Name | Compressore Station # 1 |
| Segment Name | Gas Suppy Tubing To Valve A2-D1 |
| Federal | No |
| Location Type | Operator-Controlled Property |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Typical Aboveground Facility Piping Or Appurtenance |
| Crossing | No |
| Pipe Facility Type | Interstate |
| System Part Involved | Onshore Compressor Station Equipment And Piping |
| Item Involved | Tubing |
| Installation Year | 1999 |
| Material Involved | Material Other Than Carbon Steel Or Plastic |
| Material Details | Stainless Steel |
| Release Type | Other |
| Release Type Details | The Supply Gas Tubing To The Station Discharge Valve's Actuator Came Dislodged During An Esd Event Which Kept The Valve From Going Fully Closed. |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 481 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 65118 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 608 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Prpty | 65726 |
| Accident Psig | 845 |
| Mop Psig | 860 |
| Mop Cfr Section | 192.619(A)(1) View CFR 49 §192 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Pipeline Function | Transmission System |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | Yes |
| Accident Identifier | Other |
| Accident Details | Local Operating Personnel Including Contractors. |
| Investigation Status | No, the operator did not find that an investigation of the controller(s) actions or control room issues was necessary due to: (provide an explanation for why the operator did not investigate) |
| Investigation Status Details | This was a manned facility and the gas control or scada was not responsible for the events that occurred at the compressor station. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Defective Or Loose Tubing Or Fitting |
| Eq Failure Type | Defective Or Loose Tubing Or Fitting |
| Additional Vibration Ind | Yes |
| Preparer Name | K**** B****** |
| Preparer Title | Pipeline Engineer - Compliance-Codes And Standards |
| Preparer Email | K************@k***********.com |
| Preparer Telephone | 3616886492 |
| Authorizer Name | J**** H******** |
| Authorizer Title | Director - Compliance - Codes And Standards |
| Authorizer Telephone | 7133699443 |
| Authorizer Email | J**************@k***********.com |
| Narrative | On 3/1/18 at approximately 7:31 pm a compressor on unit 2 in the compressor building had an issue whereby the compressor rod packing began leaking causing the gas detector to sense 40% lel which initiated a station hazard atmosphere alarm and caused emergency shut down (esd). At 8:00pm an erl call was sent out. At 8:03 local operating personnel identified that the station esd valve was still venting gas beyond the typical station blow down time. Upon further investigation personnel found that station discharge valve (a2-d1) did not fully closed as required with an esd event. Personnel identified that the supply gas tubing to the station discharge valve's actuator came dislodged during the initiation of the esd process which prevent the full closure of this valve. Personnel isolated the supply gas and then reconnected it to the actuator. Once reconnected the gas supply was opened again and the station discharge valve closed as required. This stopped the venting of natural gas from the station's esd valve. |
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